From the *Section of Cardiology, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC; †Department of Mechanical Engineering, School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia; ‡Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC; and §Siemens Healthcare, Cardiovascular Magnetic Resonance Research and Development, Chicago, IL.